Improvement in grates for furnaces



Fig. a a r C o I Witnessesv Inventol:

-` banned #ta-tee atea-t 691mm.

`.arruinarA;Hurcnnvson, `or BERGEN, NEW JERSEY.

Letters Patent No. 107,780, dated September 27, 1,870.

` lMPRovEMx-:NrlneRATEsFOR FuRNAcEs.

vThe Schedule referred to-in these Letters Patent and making parl: ofthe same.

To all whom it'may concern: l

Be it known that I, REUBEX A. HUToHIxsoX, of Bergen, in the county ofHudson and in the State` ot `New Jersey, have `invented. certain newvand useful Improvements in Grate-Bars; and I do hereby declare that thefollowing is a full, clear, 'and exact descriptionlthereof, referencebeing had to the accompanying drawingmaking apart of this specification,nwhich i l -A i n .l Figure 1 Vis `a plan view of the upper side of myimproved grate-bars, as secured in relative "position Figure 2 is ave1tical longitudinal section of the same, on the line a: :c of tig. l;

. Figure 3 is a top wiew of the sectional rod ein-i ployed in connectingtogether the bars; and

Figure 4; is v`a sidcclevation of a washer, for use upon said rodandbetwcen said bars. l Letters of like name and kind refe'r to likeparts in each of the figures;

My invention is an improvement in the means employed for connectingtogether grate-bars; and

It consists, principally,.in securing grate-bars iu their properrclativepositions, by. `means, ot' one lor more-rods, passing horizontally. and`transversely through suitable openingswithin the same, substan- -tiallyas hereinafter set forth. g: l

It also consists inthc peculiar construction ofthe n rod, employed forconnecting together the bars, by

means of which the length ot' said rod may bc varied inraccordance withthe number ot bars used, as here# inaftershown. V

It finally consists in securing the desired lateral adjustmcnt of thebars, with relation to each other, by meansof washers,interposed.betweenthe samc,`and

`supported by thc com'iectingaods, substantially as and forthe purposespecified.`

`In the annexed drawing-- l' `and A represent a series of gratebars,`having .l `the usual form,and each provided with two or more bosses,.B, projecting horizontally outward from opr posite sides thereof, withtheir vertical faces parallel with the sides of saidbars.

As seen in iig. 2. thesides of -the bossesB are vertical and parallel,until within about one-fourth their length `fronrthe upper and-lowerends thereof, from whence said sides extend inward, atan angle of aboutfortyfve degrees, and, meeting, furnish adoublc in` eline, theobject ofwhich is to throw toeither sidcV thevashcs falling between said bars,and thus prevent any from lodging so as to obstruct the free passageofair throughthe grate.` s Passing horizontally and transversely throughcach boss, is a rectangular opening,having its longest axis facedvertically, which receives a corresponding metal Vbar O, that, passingthrough the entire set of "bars, confines them in their proper relativepositions,'and prevents displacement-trom the action ot' the fire orfrom accident.

Although the rod C may be formed of one piece, it

desired, it has been found advantageous to construct it lof a series ofshort bars, c, having a length equal to the distance between the centersofthe outer of three bars, and a thickness equal to one-half that ofsaid rodO, so that, when placed in position, within said bars, with thesections brcaking- ]'oints,7 as shown in 'g.3, cach section shall hareabcaring within three The end sections c' are the full thickness of thebar C, from their outer ends inward, one-half their length, and, fromthencel to their inner'cnds, are tenoned out so as to receive the end ofone of thesections c.

As thus constructed, the rod C may be adjusted to position or removed,or any one of the grate-bars taken out,` without intertbringwith andrequiring the rcmoval of the entire grate, in addition to which the costof repairs to said rod is materiallyr lessened, as, when l an/y portionbecomes warped or burned out, it can be" replaced at a comparativelysmall expense.V

` For use in different furnaces, it being required that the grate-barsshould bc capable of a relatively lateral adjustment, so as to vary thewidth of the air-passages, between the same', thc lugs upon the sides ofthe bars:

are constructed of such a thickness as to enablel said bars to be placedas closely together as is ever required, while, in o rder to increasethe space between the same, and insure their relative lateral positions,one or more washers, l), having the general form of said lugs, areplaced uponeach connectingfrod and 'between each grate-bar, as shown intig. 1.

Having thus fully set forth thenature andr merit-s` \Vitnesses:

J. M.l KEEP, NV. A. NICHOLS.

